Grinding-machine.



A. L. HATFIELD. GRINDING MACHINE.

APPLICATION FILED MAY 4.1915.

1,176,895; Patented Mar. 28, 1916.

2 SHEETS-SHEET l- WITNESS INVENTOR.

A TTORNEY.

THE COLUMBIA PMNOCIRAPH 00., WASHINGTON, n. c.

A. L. HATFIELD.

GRINDING MAC APPLICATION FILED M ,I9l5. 1,176,895. Pate Mar. 28,1916.

. SHEET 2- EETS- 2 1.5 Pi g. 2

22 2s 11 V- L11 111 1 E y w I E I k 1 WITNESS a 15 INVENTOR W I? awe/w; NW1.

' ATTORNEY.

- ofqb ad USIE learn-r union.

ANDREW. L- HATF L O -A N ER IGNQR T HY LD lY AlE EA r'.

TUBING COMPANY, A CORPORATION OF NEW YORK" GRINDING-MACHINE.

V Specification of Letters Patent.

Patented Mar. 28,1916.

Application filed May 4, 1915. gSerial No.25,=691. I

and useful Imp'rovementsin Grinding-Ma chines, of which the following is a specificationw, v r

The objectsof this invention are toprovide a grinding machine which; canv be used y bar-he eon t li e-f r grinding. t eir ev rieus t ols toxsl a pen t e samest o. p ovi e a single almaehine, sp lly: a apted- ,to, g d. arious itools onninstrument t s cure n improvedz construction. e abling, each-.;kind; to: beground readil andmvith great 1 01 913 1? compactnessqand reduction ;o number-pf ,parts ;';to provide a horizontal: "grinding surface mounted; upon a table adapted torotate about. a vertical axis; toqadniit readilystopping 'saidtabl'e from rotating and starting the; same; to; secure, simplicity; of construction: and}. operation, and to obtain other advantages and results as be brought out-in thefollowing description;

Referring to theaccompanying drawings, in; which like: numerals of reference indicate thesame parts throughout the several views, Figure -l isa plan view-iota machineembodyingomy invention ;'1-;Fig. 2 is'an elevation of the same looking at the end: nearestthe bottomof-the sheet; in .Fig.,. 1; Fig.,.3 is a transverse sectional View on lineA- -A of Fig. 1, andFigA is-a perspective View of a cam :lever for. raising; the table.-. V

In the specific embodiment ,ofthealnvention illustrated; in said drawings, the-refer- 7 disk-t of substantially the 61'166'11111'1'161121111 indicates a base upon which the various parts; are mounted. Carried at the ifrontcornerof the baselisia vertically disposed pedestal 2 providing a centralaborel 3 adapted to receive the stem 4 of a table 5.

- Preferably? the table isdisk shapewith its stem) tlzextending therefrom whereby'the table may. be caused tosrotate in a plane'substantially'parallelto the base. 'At thetop of; said'table. is provideda grinding surl face which may be formed integral with said table .or separately as may be found most convenient o'ndesirabler. As shown in the drawings said,grinding surface is formed separablevfrom the table, and comprises a same diameter as h ablea- IQAO HanysuitabIe material adapt.- ed jto the vpurpose; Projecting. upwardly from I the table eccentric to the center thereof,..1s,a pin 7 adapted to-be-recei-ved inia pocketfi in'thedisk 6 whereby tlieidislnand table ;may: be caused to; rotate together By th s onstruction it will :be obvious that as the grlndlng surface, lbeoomeslworn it may be replaced, or where; it is desiredetonsuhe stitu-te, disks? providing grinding surfaces having; greater orqless abrasive qualities, the sanze I may be ,done with: ease; and: at small cos Prefera lyithfi Periphery: ofthentable 5 31 2 t ward its unden side, as: at a 9,. and;

engages at, one .sid e; of thepedestal with a frict on: drive whee/1:10; Said drive avheel isishown-arranged in; a planeiperpendieularto; ,the {plane 1 of, thetableand has its; pee;

riphery beveled to corre'spondhwith theloe, eled periphery oflsaid table, caused to rotate continuously by any Suitable means such asthe-motor: 11- shown. 7

In operation, when it is desired to! placea blade, 3.8 13011 instance a bladelsuoh ;as used mep pperswhich h satdbezlaidflat upon'the gr nding surface ,so, as not, toround the edges, :it is-Lpreferableato, place said blade upon the gnindinglsurfaoe; when the sameis standing still. i In: order t0! dolthis, the table is adapted to beraised-nso ,asnot toiengage the drive-wheel 10 land 1 consequently will stand still atlsuchtimeg Thelblade isthen placed upon, the grinding; surface and held there as the 1 table is lowered and ,again, rotates As; shown in: :the drawings, the stem 4 is long enough and of uniform diameter. within the pedestal so aslto-providean Idea quatebea-ring surface andu-allow the table to be raisediand lowered without any material wabbling." The under side of the tablepis preferably a smooth vor polished surface so that the operator can easily and safely lift these-me with his :fingers while it is rotating. Foragreater safety, howevera cam 39 is pivoted asat 4 0 to the pedestal. adapted whenswung to raise the. table. It, will be noted from thedrawings that thetable in its lowered positionis supported byengagement with the friction drivewheellO, the weight ofthe' tableand pressure exerted bythe operator uponathe blade being sufficient toobta-in an efficient and; positive drive.

The friction drivewheel: 10 is mounted;

and, may 'be' upon one reduced end 12 of aehorizontalj shaft 13 supported in separated arms 14, 14 of a standard 15. Upon the shaft 13 between the arms 14, 14 is a drive pulley 16 preferably as wideas the space between said arms and secured to said shaft so that the same is prevented from longitudinal movement. Between the arm 14 and the friction wheel 10, is a sleeve 17 and upon the opposite side of the friction wheel 10 is a nut 18 adapted to clamp the friction wheel against the shoulder formed by the difference in diameter of the shaft. The opposite end of the shaft 13 projects beyond the standard and is reduced and carries non-rotatably thereon a grinding cylinder or roll 19.

Above the shaft 13 and parallel therewithis another shaft 20 rotatably mounted in the arms 14, 14 and reduced at its opposite ends beyondsaid arms. At its end overlying the grinding roll 19 the same carries a similar roll 21, and at its opposite end, is arranged a grinding wheel22. Between the arms 14,

14 and upon said shaft is a pulley 23. A

belt 24 extends from said pulley to a corresponding pulley 25 on the motor 11. The

same'pulley 25; may be utilized for driving both of said pulleys 16 and 23 on the parallel shaft 13,- 20 the belt 26 on the first of said shafts being crossed so as to rotate-said shafts in opposite directions.

Preferably thegri ding cylinders are separatedso as to admit'applying alter-- nately thereto a razor bla'de'for sharpening the same. In order to support a blade and apply'it to the rolls, a lateral extension 27' is provided on the arm 14 of the standard toward said j rolls, said extension being; arranged midway between the grinding roll shafts 13; 20' and perpendicular to the common planeof said shafts.

if tension is longitudinally recessed and adapti 7 theblade to theopposite rolls. The operaed to receive a rod or blade holder support 28,.andis also provided with set screws 29 for holding said rod in'any adjusted posi- 7 tion. 'At a distance from the end of the eX- tension, said rod is bent at substantially right angles to itself and extends "parallel, as at 30, to

the grinding rolls19, 21. [Slide ably supported by this parallel portion 30 of the rod 28, is a suitable blade holder 31 adapted to be rocked'up and down onsaid parallel portion so" as to 'alternatelypresent 'tor;may' both rock the blade holder and move it longitudinally ofthe portion 30 of the rod 28 .while grinding the blade so as to-present the same to differentiportions of the rolls and grind it evenly upon both sides, and when the blade is sufficiently ground the blade holder may he slid entirely off of theend of the rod 28 and the blade exchangedfor another. 'It will be noted that the end of the rod 28terminates sufficiently beyond: the plane of the ends of the grinding Said explaced upon the rod before the bladeenters at all between the grindingrolls., For holding work in proper "relation-to the grinding wheel 22, a work support 32, is provided adjacent the periphery thereof, said work support being-vertically adjustable and adapted to be twisted and adjusted roll so that the' blade holder 31 may be to any desired position and angle; Asshownl V in the drawings the work support 32 provides a work holding member 33 havlng a cylindrical stem .34 carried in a correspond mg recess of a. transverse member 35. Said transverse member alsoprovides a cylindrl- V cal stem 36 carried in'a horizontal-member 37 also having acylindrical' stem- 38 and supported by the arm 14 of the standard 15 next the grinding wheell; 'It'will be noted that the stein 38' of this last or horizontal member 37. is perpendicular to the plane of the shafts'13, 20'; that 'thetra-nsverse horizontalmemb'ers 3'5 38 are in substam V tially the same plane; and atrightangles'to 2 each otherranjd that the transverse member 35 and the work 'holdingmember33 arein bers are round and admit turning oneimemher with respect to'the o'ther, and sin'ce all of saidmembers are-adjustably slidjable; a

r 7 great rangeof adj ustability of'the work sup port is afiorded; it being {understood that suitable clamping'meansare,pr V e V preventing-inadvertent movement Ofj'Said '2 Obviously detailamoi'd if'i ca'tiion s and i i changes may be, made inthemanufacture' off i 7 members when adjusted; I

my improved grinding machine without 'd eparting Tfrom'the spirlt andscope of th'e in j vention, and Ido not wishto; beaunderstood as limiting myself except-as required bythe following claims when-construed in the light of theprior art;-

I 1" l Having thus described the invention, what I claim' is,'

tion with a shaft andimeans, for driving the V '11 O LIn a gr1nding,machine,lthe combinasame," of a drive wheel on said shaftgiia' ro tatable grinding tableengagingsaidldrive:

wheel, and means for supporting saidgrind 'ing table sovthatimovement in-a direction perpendicular to it will engageit with"or: V7

disengage it from said drive wheel.

porting saidf grinding table so? that axial movement thereof will. engage it with or 3.111 a grindlng machine, the combine;

driving the same, of" a drive wheel on said disengage it from said ;dri ve wheel. 1

' tion with a horizontal shaft and means for? g '90 V a conunon'planeiand at right angles to "each V other. Since thestems'of. allithe said mem- I shaft having its periphery beveled, a grinding table having a beveled periphery adapted to engage the beveled periphery of said wheel, and means for supporting said grinding table so that movement in a direction perpendicular toit Will engage it with or disengage it from said drive Wheel.

4. In a grinding machine, the combination with a shaft and means for driving the same, of a drive wheel on said shaft, a rotatable grinding table engaging said drive wheel, a grinding member removably mounted upon'said table and mounted to rotate therewith, and means for supporting said grinding table so that movement in a direction perpendicular to it will engage it with or disengage it from said drive Wheel.

5. In a grinding gachine, the combination with a shaft and means for driving the copies of this patent may be obtained for five cents each, by addressing the same, of a drive Wheel on said shaft, a rotatable grinding table engaging said drive Wheel, means for supporting said grinding table so that movement in a direction perpendicular to it will engage it with or dis engage it from said drive wheel, and means for moving said table to disengage it from said drive wheel.

6. In a grinding machine, the combination with a shaft and means for driving the same, of a drive Wheel on said shaft, a rotatable grinding table adapted to interchangeably-support one of a plurality of grinding members, and means for supporting said grinding table so that movement in a direction perpendicular to it will engage it with or disengage it from said drive wheel.

ANDREW L. HATFIELD.

Commissioner of Patents,

Washington, D. G. 

